Uighur Group Disputes China's Assertion of Terror Attack

BEIJING—An overseas group advocating on behalf of China's mostly Muslim Uighur ethnic minority cast doubt Wednesday on the Chinese government's assertion that a recent outburst of deadly violence in the far-western Xinjiang region was the result of a terrorist attack.

On the same day, prosecutors in the Xinjiang capital of Urumqi announced that dissident Uighur economist Ilham Tohti, taken from his Beijing home by police in January,...